pop off
— Verb
– English
~ pass from physical life and lose all bodily attributes and functions necessary to sustain life; "She died from cancer"; "The children perished in the fire"; "The patient went peacefully"; "The old guy kicked the bucket at the age of 102"
pop out
— Verb
– English
~ come out suddenly or forcefully; "you stick a bill in the vending machine and the change pops out"